RE: "If %scan(x:y)" is not valid???

["Bob Cozzi" <cozzi@xxxxxxxxx>]

Dan,

Yes the %SCAN returns a 10i0 value that is the position where the scan
detected the value, or zero if it is not found. Since the IF statement can
only evaluate logical expressions (i.e., indicator type stuff) you need to
put it in a form that the IF statement understands, hence "if %scan(...)  >
0".  I don't much like it either, but that's the way it is.
I like your scan routine that validates the field for a "values" clause.  If
you have my RPG ToolKit you can use the "InList" procedure and do it the way
you said you'd really like to, as follows:

  if         InList(W_WIPSTA: 'B':'H':'I':'P')
  ....
  Endif

Bob Cozzi

-----Original Message-----
From: rpg400-l-bounces@midrange.com [mailto:rpg400-l-bounces@midrange.com]
On Behalf Of Dan
Sent: Monday, February 10, 2003 2:55 PM
To: rpg400-l@midrange.com
Subject: "If %scan(x:y)" is not valid???


(All variable fields described here are 1-character)

I was somewhat surprised to find that 
   C          IF        %scan( ACFLAG : 'ABC' ) 
does not compile, even at v5r2.  I have to add a "> 0" test to make it work,
i.e., 
   C          IF        %scan( ACFLAG : 'ABC' ) > 0

I am trying to avoid the 
   C  ACFLAG  SCAN   'ABC'
   C          IF     %FOUND

Currently, I am looking at a block of code like this
   C          IF           ACFLAG = 'A'
   C                         AND (   W_WIPSTA = 'B'
   C                              OR W_WIPSTA = 'H'
   C                              OR W_WIPSTA = 'I'
   C                              OR W_WIPSTA = 'P')
   C                         AND (   W_BILTYP = 'C'
   C                              OR W_BILTYP = 'F'
   C                              OR W_BILTYP = 'R')
and would like to simplify it thusly:
   C          IF           ACFLAG = 'A'
   C                         AND %scan( W_WIPSTA : 'BHIP') > 0
   C                         AND %scan( W_BILTYP : 'CFR' ) > 0

(Actually, my example is simplified; I have more tests than that.) Is this
understandable?  At first glance, I found it confusing.  I would much rather
code this more like:
   C          IF           ACFLAG = 'A'
   C                         AND W_WIPSTA = ('B' 'H' 'I' 'P')
   C                         AND W_BILTYP = ('C' 'F' 'R')
where multiple values in a parentheses set in an "if equal" test logically
implies an OR grouping.

Curious minds need to know...
TIA, Dan

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